Freaks City

Maven Dependencies Add the following dependencies to you're pom.xml: <!-- MyBatis integration for Spring Boot --> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.3.1</version> </dependency> <!-- MySQL ...

Why Use Docker Compose? While its possible to manually run individual containers for Nginx, PHP, and MySQL, managing them becomes tedious when configuration changes are needed. Without an orchestration tool, updating a setting requires stopping the container, removing it, and running a new docker run command with the updated parameters. Docker ...

Server Layers and Storage Engines MySQL is split into three logical layers: Connection & Authentication – handles client hand-shake, privilege checks, SSL, thread pooling. SQL Layer – parses, optimizes, rewrites and executes statements. All built-in functions, views, triggers, stored procedures live here. The query cache was removed in 8.0 ...

Database Shardign Implementation Mycat Installation and Configuration Download Mycat from the official repository. For Linux environments, extract the package using: tar -xvf Mycat-server-1.6.7.1-release-*.tar.gz The extracted directory includes: bin: executable scripts conf: configuration files (schema.xml, server.xml, rule.xml) lib: require ...

Working with SQL proficiency forms the basis for using Python modules to interact with MySQL in production tasks. Installing and Importing the Driver Install the MySQL driver via package manager: pip install PyMySQL Import the module in code: import pymysql Connection Object Establishes a link to the database. Instantiate it using pymysql.con ...

1. Common mysql Command Options 1. --auto-rehash (tab completion for table names and fields) # mysql -u root --auto-rehash # vim my.cnf [mysql] auto-rehash 2. -B (disable history file, non-interactive mode) # mysql -uroot -D test -e "show tables;" -B 3. -E (vertical output for query results) # mysql -uroot -D test -e "sho ...

Database Connection Setup Establishing a connection to the database is the initial requirement for acessing table metadata. The JDBC API provides the necessary tools for this operation. import java.sql.*; public class DatabaseMetadataReader { private static final String DB_URL = "jdbc:mysql://localhost:3306/test"; private sta ...

The Stocks table schema is defined as follows: Column Name Type stock_name varchar operation enum operation_day int price int The primary key for this table is the combination of stock_name and operation_day. The operation column is an enumeration containing ('Buy', 'Sell'). Each row represents a transaction made on a specific s ...

Conditional Expression Syntax MySQL supports two forms of conditional expressions using the CASE construct for implementing decision-making logic within queries. Simple CASE Based on Column Values The simple form compares a specific column's value against predefined constants: CASE column_expression WHEN constant_value_1 THEN return_value_1 ...

Framework Overviewfeapder is a robust Python scraping framework that simplifies data extraction through four built-in spider templates: AirSpider, Spider, TaskSpider, and BatchSpider. It natively supports resumable crawling, alert notifications, browser rendering, and large-scale data deduplication. Deployment and scheduling are managed via the ...